Optimism for blackgrass control grows with new herbicide Luximo – Farmers Weekly


Blackgrass control is about to change into simpler to attain this autumn in winter wheat with the launch of the primary new mode of motion herbicide for many years, which outperforms the trade normal and can assist deal with resistant grassweeds.

Manufacturers BASF acquired approval for its new energetic Luximo in Britain earlier this month and it’s anticipated to be broadly accessible this autumn, and though more likely to be priced larger than present merchandise it provides higher control than broadly use flufenacet.

Steve Dennis, the agrochemical big’s head of enterprise improvement, says the new soil residual energetic can be utilized in wheat on the pre- and early submit-emergence stage, and offers 78% control of blackgrass in contrast with simply 58% for flufenacet. It provides an excellent larger benefit for Italian ryegrass control.

“This is a new mode of motion energetic which supplies a greater than 20% uplift in opposition to the perfect single energetic flufenacet,” he advised a product launch briefing.

See additionally: Contractor invests in Zurn Top Cut Collect blackgrass harvester

Fight in opposition to resistant blackgrass 

Resistant blackgrass prices English growers greater than £400m yearly, so the new energetic shall be essential within the struggle in opposition to this resistance.

The firm sees the new product as an eventual alternative for flufenacet, which might battle to control resistant grassweeds.

The product shall be accessible as Luxinum Plus in a co-pack with Stomp Aqua. The former delivers 500g/ha of the energetic cinmethylin (Luximo) and the latter 900g/ha of pendimethalin for the grower to combine within the sprayer tank. That interprets to 0.7litres/ha of Luximo and 2litres/ha of Stomp Aqua.

The group declined to place a worth on the new product, however stated in comparison with a benchmark pre-emergence mixture of flufenacet, pendimethalin and diflufenican (DFF) (Crystal plus Hurricane) costing £50/ha, the Luximo mixture would have an “innovation efficiency premium”.

In the classification of mode of actions of main grassweed herbicide, tri-allate (Avadex), flufenacet and prosulfocarb (Defy) are comparable, whereas pendimethalin and DFF are in two completely different teams, and Luximo is in a unique group altogether.

Outperforms flufenacet

Stuart Kevis, the group’s herbicide enterprise improvement supervisor, who has labored with the new product for 10 years, says it has all the time outperformed flufenacet in heavy and low blackgrass conditions and throughout a variety of soil varieties.

He added that Luximo with pendimethalin provides the same degree of control to a posh sequence of a tri-allate-flufenacet-pendimethalin-DFF remedy. He stated that wheat drilling must be to a 3cm depth and growers ought to look to shut up the drilling slot to stop herbicide going immediately onto the wheat seed.

“The greatest place for Luximo is within the pre-emergence slot as its efficiency drops off on the peri- and submit-emergence phases,” he stated.

Application timing could be from pre-emergence as much as GS30 within the spring, with pre-emergence the popular timing. As nicely as blackgrass and ryegrass, Luximo additionally controls annual meadow grass and poppy.

Wheat handled with Luximo © MAG/David Jones

Don’t neglect cultural controls

John Cussans, weed skilled at crop advisor Niab, welcomes the new energetic introduction, which can assist in the struggle in opposition to blackgrass, however reminds growers to not neglect cultural strategies similar to delayed autumn drilling and spring cropping within the battle to control the grassweed.

“It’s a new mode of motion, so it give us one thing completely different, and for ryegrass is it will be significant due to flufenacet resistance,” he stated.

The energetic cinmethylin was first found within the Nineteen Seventies however was then too expensive to provide and just one batch was made for use on rice in Asia.

It was then “put again on the shelf” and forgotten about till it was later screened for blackgrass in European situations with optimistic outcomes.

Approval from the Chemicals Regulation Division (CRD) implies that Britain is the second nation on this planet to be utilizing Luximo after Australia, with the product nonetheless awaiting approval within the European Union.

The subsequent approval is more likely to be a Luximo-pendimethalin prepared-blended product.

Rob Gladwin, the agrochemical firm’s head of technical administration for agricultural merchandise for the UK and Ireland says Luximo is the primary wholly CRD-managed energetic substance approval gained by any producer since crop safety regulation was repatriated following Brexit, and comes 21 years after flufenacet was first accredited within the UK.

Farmers’ views

Essex grower Ed Ford has been utilizing Luximo for two years on a trial foundation, and believes it provides him added flexibility within the struggle in opposition to blackgrass, which is already underneath very shut control on his heavy soils.

The Ford household farms 1,200ha, with 600ha at Childerditch Farms, close to Brentwood, whereas the remainder is lighter land in Bedfordshire, and he spends as much as £15,000/12 months available rogued blackgrass throughout the 300-350ha of wheat he grows on the Essex farm.

His wheat is all direct drilled and the common blackgrass herbicide value on the farm is about £95/ha together with Avadex, Crystal and Hurricane, and he believes the usage of Luximo will assist enhance control.

“Luximo provides us extra flexibility with timing – each for drilling and spraying. We have 99% control of blackgrass, however this isn’t sufficient. We want 100% and Luximo will help,” he stated.

Northamptonshire grower Andrew Pitts says the higher control supplied by Luximo might truly reduce prices, as a simpler pre-emergence herbicide could rule out a submit-emergence spray on the 800ha of land he farms at The Grange, Mears Ashby, between Northampton and Wellingborough.

He is already controlling blackgrass by rotation, delayed drilling, spring cropping, utilizing excessive seed price and good drainage, and says higher blackgrass control throughout his 400ha of winter wheat might enable him to develop a second successive wheat seed crop of the identical selection.

Mr Pitts has not used Luximo on the farm, however he says utilizing the perfect chemistry at the perfect timing might imply that no comply with up remedy could be wanted.

“It might assist us streamline our blackgrass control and result in us spending much less by lacking out an early submit emergence,” he stated.

Cultural control

John Cussans standing in field

John Cussans © MAG/David Jones

John Cussans of Niab says a one month delay in drilling can deliver a 50-60% discount in blackgrass density in winter wheat, and warns growers that they’re “not going to spend their means out of the blackgrass drawback”.

He says each week of delaying drilling will help scale back the reliance on a basket of pre-emergence merchandise, and provides {that a} September drilled crop with 450 blackgrass vegetation/sq m could be lowered to underneath 100 vegetation/sq m just by delaying drilling till October.

“If you might be drilling winter wheat with 1,000 blackgrass vegetation per sq. metre then you’ll have to spend £120/ha earlier than you see any impact on the blackgrass,” he stated.

Will Smith, senior trials supervisor additionally at Niab, says that though inter-row cultivation just isn’t an sufficient single instrument to provide good control of blackgrass, when used alongside herbicides it may give helpful control.

He stated two passes within the spring with an inter-row hoe might give 30-40% control, at a price per move of about £15-20/ha, and allied with a herbicide regime may give superb control ranges.

“Inter-row cultivations utilized in conjunction with herbicides can enhance total weed control,“ he stated.

Widely used blackgrass herbicides

Avadex – tri-allate 
Crystal – flufenacet + pendimethalin
Defy – prosulfocarb
Hurricane – diflufenican
Liberator – flufenacet + diflufenican
Luxinum Plus – cinmethylin
Stomp Aqua – pendimethalin

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